Holdee foe incandescent eleoteic lamps



- Unrrnn STATES- PATENT Prion.

ALFRED S\VAN-, OF GATESHEAD, COUNTY OFDURHAM, ENGLAND.

HOLDER FOR INGANDEISCEN'T ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 292,447, dated January 22, 1884.

Application filed July 23, 1853. (No model.) Patented in England May 21,1883, No. 9,528; in France June 19, 1883, No. 156,137,- in Belgium June 21, 1853, No. 61,778; in Canada August 10, 1881!,No. 17,469, and in AuslriaHungary October 5', 1-583, No. 27,350 and To (tZZ whom, it may concern:

Be it known that I, ALFRED SWAN, a subj ect of the Queen of Great Britain and Ireland, and residing in the borough. of Gateshead,

county of Durham, England, have invented will give a firm support for the same and allow of the ready detachment of either the bulb from the part which directly holds it or of both the bulb and the said part together from the bracket-support or electrolier. At the same time also, if desired, the said holder will answer the purpose of a tap for the lamp.

1 will describe my invention with reference to the accompanyingdrawings.

Figure 1 represents a holder constructed according to my invention and affixed to a bracket. Fig. 2 is a vertical section of the same. The part A, which directly holds the bulb, is carried by a part, B, affixed to the end of the bracket or the like. The bulb is separable from the part A, or the said bulb and the part A can be removed from the part B together without removing the bulb fromthe part A, as hereinafter described. Figs. 3 and A are views of the part A, taken at right angles to each other. Fig. 5 is a plan of under side of the part A with the cap-piece a removed; and Fig. 6 is a section on the line 1 2, Fig. 2, showing the part B in plan of under side and the part A in section. Fig. 7 is a modification of the part A, as hereinafter described.

The part A is made of non-conducting material, and contains two pairs of jaws, a a The parts a of the said jaws are led through the part A, and are in metallic connection (through the springs 12 in the part B) with the current wires 0, as shown clearly in Fig. 2. The other parts, M, are capable of being pressed away from the parts a by means of a pusher, (Z, the springs e causing the jaws to a, when pressure is released from the pusher d, to close firmly a, which enters a recess in the other part of the jaw. The cappiece a of the part A-is formed-as shown, for example, in Fig. 2-to correspond with and fit the end of the bulb. The attachment of the bulb to the part A is effected by pressing the pusher (I so as to cause the jaws a a to open when the loops of the terminal wires are passed over the pinsrd, and on releasing the pusher (Z the jaws are acted upon by the springs 6, so that they close together and grasp the terminal loops between them and firmly retain the bulb in place in the said holder. the jaws are opened, and the bulb can readily be removed from the part A. I

Fig. 7 shows amodification (with the jaws op en) wherein the thumbpiece d, to which are attached the back parts, a, of the jaws, bears against the piece e", which, in its turn, bears upon a spring, 0*, in the form of a blade, which may be held in its position by a projection at the middle fitting into a corresponding depression in the bed-piece. The attachment of the part A to the part B is effected by means of the springs 11, which are undercut or formed with projecting parts I) at their ends, as shown in Figs. 2 and 6, and the said springs are also formed with recesses for containing the metallic conducting parts of the part A, which conducting parts may be formed by continuations of the parts a of the jaws, as shown in Figs. 2 and 6. The upper portion of the part A is formed, as shown in Fig. 6, with shoulders or ledges a at opposite sides, and the part B is formed with a recess to receive this upper portion of the part A, the projections b of the springs b projecting into the said recess. The part A, when in a' position at right angles to that shown in Figs. 2and 6, is passed into the recessin the part B, and then, by turning the said part A through a portion of a rotation, the shoulders a engage with the projections b of the springs 12, the upper parts of the pins a engaging withthe recesses in the said projections of the springs 12, thus making a metallic circuit between the conducting-wires to and By pressing upon the pusher d from the lamp. By giving the part-A a motion of partial rotation, the pins (0 will pass from contactwith the projections of the springs I), and when brought to a position at right angles to that shown in Figs. 2 and (i the said part A, together with the bulb, can be readily removed from the part B. If an intermediate position be given to the part A in the part B, the pins to maybe brought out of contact with the projections I) of the springs b, and thus the lamp be extinguished while the ledges a are still engaged with the said projections, and the part A and the bulb are still held to the bracket.

The non-conducting parts of the parts A and B may be made by molding in glass or other material, and the conducting or metal parts may be produced by stamping, whereby the entire apparatus maybe produced at small cost; but I do notlimit myself to any particular material or process of manufacture, pro vided that the conducting parts are properly insulated.

It will be evident that the lamp-holder can also be used to support the lamp in the reverse orany other position from that shown in the drawings.

I claim 1. The holder for incandesecnteleet-rielamps, consisting of the part- A, which directly holds the bulb, and a part, 13, united to part A by spring fastening devices, so that the bulb can be readily removed from the part A, or the part A and bulb remor'ed together from part B, snbstantially as described.

2. In a holder for incandescent lamps, the combination of the recessed part B, the part A, detachably connected with the bulb and having shoulders or ledges on opposite sides, and springs on said part B, for engaging with said shoulders or ledges when the part A is turned in the proper position, substantially as described.

3. The combination, with the part B and springs I), connected with the linc'wires, of the part A, shoulders or ledges extending partly around said part A, for engagement with said springs, and conducting-pins carried by said part A, and arranged so that the said part can be turned to break contact between said clamping-springs and conducting-pins without rcleasing said shoulders or ledges from engagement with said springs, substantially as described.

4. The combinatiomwith thebulbandlooped 

